ANSI /ASME B16.5 class 2500 blind flange
Blind flange is used to blank off pipelines,valves and pumps,it can also be used as an inspection cover.It is sometimes referred to as a blank flange.ANSI/ASME B16.5 standard covers pressure,temperature,ratings, materials,dimensions,tolerances,marking,testing,and methods of designating openings for pipe flanges and flanged fittings.Blind flange dimensions are covered in ANSI/ASME B16.5 class 2500 for size NPS ½” to 12″.
ANSI/ ASME B16.5 Class 2500 Blind Flange Dimensions
ANSI ASME B16.5 Class 2500 Blind Flange Dimensions
| Nominal Pipe Size
|
Pipe | Flange Data | Raised Face | Drilling Data | Weight | |||
| A | C | G | H | I | J | |||
| Outside Diameter | Overall Diameter | Flange Thickness min | Face Diameter | Number of Holes | Bolt Hole Diameter | Diameter of Circle of Holes | kg/piece | |
| in mm |
in mm |
in mm |
in mm |
in mm |
in mm |
|||
| ½ | 0.840 21.30 | 5.250 133.4 | 1.190 30.20 | 1.380 35.10 | 4 | 0.880 22.40 | 3.500 88.90 | 2.99 |
| ¾ | 1.050 26.70 | 5.500 139.7 | 1.250 31.70 | 1.690 42.90 | 4 | 0.880 22.40 | 3.750 95.30 | 3.50 |
| 1 | 1.315 33.40 | 6.250 158.8 | 1.380 35.10 | 2.000 50.80 | 4 | 1.000 25.40 | 4.250 108.0 | 4.96 |
| 1¼ | 1.660 42.20 | 7.250 184.2 | 1.500 38.10 | 2.500 63.50 | 4 | 1.120 28.40 | 5.120 130.0 | 7.35 |
| 1½ | 1.900 48.30 | 8.000 203.2 | 1.750 44.50 | 2.880 73.15 | 4 | 1.250 31.75 | 5.750 146.1 | 10.4 |
| 2 | 2.375 60.30 | 9.250 235.0 | 2.000 50.80 | 3.620 91.90 | 8 | 1.120 28.40 | 6.750 171.5 | 15.6 |
| 2½ | 2.875 73.00 | 10.50 266.7 | 2.250 57.15 | 4.120 104.6 | 8 | 1.250 31.75 | 7.750 196.9 | 22.6 |
| 3 | 3.500 88.90 | 12.00 304.8 | 2.620 66.55 | 5.000 127.0 | 8 | 1.380 35.10 | 9.000 228.6 | 34.8 |
| 4 | 4.500 114.3 | 14.00 355.6 | 3.000 76.20 | 6.190 157.2 | 8 | 1.620 41.10 | 10.75 273.1 | 53.9 |
| 5 | 5.563 141.3 | 16.50 419.1 | 3.620 91.90 | 7.310 185.7 | 8 | 1.888 47.88 | 12.75 323.9 | 90.8 |
| 6 | 6.625 168.3 | 19.00 482.6 | 4.250 108.0 | 8.500 215.9 | 8 | 2.120 53.80 | 14.50 368.3 | 141 |
| 8 | 8.625 219.1 | 21.75 552.5 | 5.000 127.0 | 10.62 269.7 | 12 | 2.120 53.80 | 17.25 438.2 | 214 |
| 10 | 10.75 273.0 | 26.50 673.1 | 6.500 165.1 | 12.75 323.9 | 12 | 2.620 66.55 | 21.25 539.8 | 411 |
| 12 | 12.75 323.8 | 30.00 762.0 | 7.250 184.2 | 15.00 381.0 | 12 | 2.880 73.15 | 24.38 619.3 | 592 |
Notes: Weights are based on manufacturer’s data and are approximate.
Specifications of ANSI/ASME B16.5 flange:
Types of ANSI/ASME B16.5 forged flanges:
 ANSI ASME B16.5 weld neck flange drawing |
Weld neck flange(WN flange) is circumferentially welded into the system at its neck which means that the integrity of the butt welded area can be easily examined by radiography.The bores of both pipe and flange match,which reduces turbulence and erosion inside the pipeline.The weld neck is therefore favoured in critical applications. |
 ANSI ASME B16.5 blind flange drawing |
Blind flange is used to blank off pipelines,valves and pumps,it can also be used as an inspection cover.It is sometimes referred to as a blank flange. |
 ANSI ASME B16.5 slip on flange drawing |
Slip on flange(SO flange) is slipped over the pipe and then fillet welded.Slip-on flanges are easy to use in fabricated applications. |
 ANSI ASME B16.5 lap joint flange drawing |
Lap joint flange(LJ flange) is always used with either a stub end or taft which is butt welded to the pipe with the flange loose behind it.This means the stub end or taft always makes the face.The lap joint is favoured in low pressure applications because it is easily assembled and aligned.To reduce cost these flanges can be supplied without a hub and/or in treated,coated carbon steel. |
 ANSI ASME B16.5 socket weld flange drawing |
Socket weld flange(SW flange) is counter bored to accept the pipe before being fillet welded.The bore of the pipe and flange are both the same therefore giving good flow characteristics. |
 ANSI ASME B16.5 threaded flange drawing |
Threaded flange is referred to as either threaded or screwed.It is used to connect other threaded components in low pressure, non-critical applications.No welding is required. |
 ANSI ASME B16.5 ring type joint flange drawing |
Ring type joint is a method of ensuring leak proof flange connection at high pressures.A metal ring is compressed into a hexagonal groove on the face of the flange to make the seal.This jointing method can be employed on weld neck flanges,slip on flange and blind flanges. |
Materials of ANSI/ASME B16.5 class 150 blind flange:
Carbon steel ANSI/ASME B16.5 blind flange:
ASTM A105,A350 LF2,SS400,P235GH,P250GH,C22.8,Q235,20#,16Mn,etc.
Stainless steel ANSI/ASME B16.5 blind flange:
ASTM A182 F304,F304L,F316,F316L,F321,F347,F310,F44,F51,etc.
Alloy steel ANSI/ASME B16.5 blind flange:
ASTM A694 F42,F46,F52,F56,F60,F65,F70,A182 F5,F9,F91,F12,F11,F22,etc.
Related:
- ANSI/ASME B16.5 class 150 blind flange
- ANSI/ASME B16.5 class 300 blind flange
- ANSI/ASME B16.5 class 400 blind flange
- ANSI/ASME B16.5 class 600 blind flange
- ANSI/ASME B16.5 class 900 blind flange
- ANSI/ASME B16.5 class 1500 blind flange
- ANSI/ASME B16.5 class 2500 blind flange
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